|
|
(6) If no leaks are detected, turn off the air supply. Remove the air hose, all plugs, and caps. Connect the (7) Clean the oil off the suspect oil leak area using a suitable solvent. Drive the vehicle at various NOTE: If oil leakage is observed at the dipstick tube T Stud & Bearing Mount (press fit tube applications only), and for O-ring style INSPECTION FOR REAR SEAL AREA LEAKS Since it is sometimes difficult to determine the source of an oil leak in the rear seal area of the If the leakage occurs at the crankshaft rear oil seal area: (1) Disconnect the battery. inspect rear of block for evidence of oil. Use a black (a) Circular spray pattern generally indicates seal leakage or crankshaft damage. (b) Where leakage tends to run straight down, possible causes are a porous block, oil gallery cup case as previously described. CAUTION: Do not exceed 20.6 kPa (3 psi). (5) If the leak is not detected, very slowly turn the crankshaft and watch for leakage. If a leak is CAUTION: Use extreme caution when crankshaft (6) For bubbles that remain steady with shaft rotation, no further inspection can be done until dis- (7) After the oil leak root cause and appropriate corrective action have been identified, replace compo- STANDARD PROCEDURE ENGINE CORE AND OIL GALLERY PLUGS Using a blunt tool such as a drift (4) and a ham- mer, strike the bottom edge of the cup plug. With the CAUTION: Do not drive cup plug into the casting as Thoroughly clean inside of cup plug hole in cylin- der block or head. Be sure to remove old sealer. t Stud and Bearing Mount. Make certain the new plug It is not necessary to wait for curing of the sealant. The cooling system can be refilled and the vehicle FORM-IN-PLACE GASKETS AND SEALERS There are numerous places where form-in-place gaskets are used on the engine. Care must be taken applying form-in-place gaskets to assure obtaining the desired results. Do not use form-in- Fig. 3 Core Hole Plug Removal 1 - CYLINDER BLOCK 9 - 10 ENGINE ZB ENGINE - 8.3L (Continued) |